长途电话管理机（智慧卡）在宁问世南京无线电仪器厂研制成功长途电话管理机，该机采用高新电子技术，由电源、运算电路、记录、显示和控制等部分组成。在微机控制下，可记录通话次数和时间，锁住１６８１－１６８６等特殊号码，也可根据需要锁住任一号码作为特殊功能。随... Long-distance telephone management machine (smart card) was developed in Ning Nanjing Radio Instrument Factory successful long-distance telephone management machine, the machine uses high-tech electronic technology, by the power, computing circuitry, recording, display and control and other components. Under computer control, you can record the number of calls and time, lock 1681-1686 and other special numbers, but also can be locked as required any number as a special feature. With ...